Anumber is 6 less than its square. find all such numbers?

Nine more than four times a number is the same as one less than twice the number. find the number?

Through non-collinear points there is exactly one plane.

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?